for SSATB unaccompanied The O nata lux text is taken from a 10th-century anonymous hymn that uses the concept of light to symbolise hope, a particularly pertinent theme for Advent. Throughout this setting the sopranos intertwine their high, melodic lines above interjections from the lower voices, creating an atmosphere of ethereal luminosity. O nata lux is the second of McDowall's set of three 'O' text settings conceived as Trinity Triptych.